Speed and angle variable refining device for three-dimensional ship bow water entry slamming test
Small-clear-distance steel rail abrasion rapid measuring instrument for sleeve rail railway
Urban rail vehicle body structure facilitating drainage
Disassembly prevention control system and method for passive locking machine of tower crane
Marking method for preventing twisting of mooring chain
Device and method for closing up middle of disc seam belt umbrella
Anti-overturning method and device for high-speed train in strong wind environment
Mineral flexible non-contact type mine car operation state induction device
Toll station portal frame lane linkage efficient passing method
Traction return current structure of alternating-current traction power supply type toothed railway
Transaction system, processing method and related device for expressway